We're told by a source familiar with Google Wallet's plans that nothing has changed between Google and Verizon regarding mobile payments. Why? Because Verizon, along with AT&T and T-Mobile, have plans for their own mobile payments service called Isis.

In fact, we're told that those three carriers could be announcing the Isis launch very, very soon.

That puts Google in a sticky situation. The nation's two largest carriers (AT&T and Verizon) along with T-Mobile aren't very likely to allow Google Wallet any time soon, for fear of Google's service eating into Isis.

Plus, Sprint offers plenty of Android phones with hardware that can support Google Wallet, but it seems like those manufacturers aren't keen to sign on just yet.